#define _CRT_SECURE_NO_WARNINGS
#pragma warning(disable:6031)
/**
 * Definition for a binary tree node.
 * struct TreeNode {
 *     int val;
 *     struct TreeNode *left;
 *     struct TreeNode *right;
 * };
 */
//
//bool _isSymmetric(struct TreeNode* root1, struct TreeNode* root2)
//{
//    if (root1 != NULL && root2 != NULL && root1->val != root2->val)
//    {
//        return false;
//    }
//    if ((root1 != NULL && root2 == NULL) || (root1 == NULL && root2 != NULL))
//    {
//        return false;
//    }
//    if (root1 == NULL || root2 == NULL)
//        return true;
//    bool a = _isSymmetric(root1->left, root2->right);
//    bool b = _isSymmetric(root1->right, root2->left);
//    return a && b;
//}
//bool isSymmetric(struct TreeNode* root) {
//    return _isSymmetric(root->left, root->right);
//}
#include<stdio.h>
int main()
{
	int i = 0;
	i++;
	printf("%d", i);
	return 0;
}